Type Definition file_per_thread_logger::FormatFn

pub type FormatFn = fn(_: &GetWriter<'_>, _: &Record<'_>) -> Result<()>;

Format function to print logs in a custom format.

Note: to allow for reentrant log invocations, record.args() must be reified before the writer has been taken with the GetWriter instance, otherwise double borrows runtime panics may occur.